Ignition and Lean Blowout Characteristics of a Reverse-Flow Combustor for an Ultra-Compact Gas Turbine Engine  

作　　者：JIN Yi HUANG Yakun YAO Kanghong ZHANG Kai WANG Yunbiao WANG Donghao 

机构地区：[1]College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China [3]Low-carbon Aerospace Power Engineering Research Center of Ministry of Education,Nanjing 210016,China

出　　处：《Journal of Thermal Science》2024年第5期1897-1906,共10页热科学学报（英文版）

基　　金：supported by the National Nature Science Foundation of China through Grant No.51506086;the Jiangsu Funding Program for Excellent Postdoctoral Talent(No.316958);the Natural Science Foundation of Jiangsu Province,China(BK20230932);the China Postdoctoral Science Foundation(No.2023M741697);the Fundamental Research Funds for the Central Universities(No.30923010306);the financial support from Low-carbon Aerospace Power Engineering Research Center of Ministry of Education(CEPE2020018)。

摘　　要：The flame stability limit and propagation characteristics of a reverse-flow combustor without any flame-stabilized device were experimentally investigated under room temperature and pressure.The results indicate that it is feasible to stabilize the flame in the recirculation zones constructed by the impact jet flow from the primary holes and dilution holes.The flame projected area is mainly distributed in the recirculation zone upstream of the primary holes,whose presence and absence mark the ignition and extinction.During the ignition process,the growth rate and value of the flame projected area first increase and then decrease with the inlet velocity increasing from 9.4 m/s to 42.1 m/s.A rapid reduction followed by a slow reduction of ignition and lean blowout equivalence ratios is achieved by the increased inlet velocity.Then the non-reacting fluid structure in three sections was measured,and detailed velocity profiles were analyzed to improve the understanding of the flame stabilization mechanism.The results are conducive to the design of an ultra-compact combustor.

关 键 词：ultra-compact combustor gas turbine reverse-flow combustor IGNITION lean blowout 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]